-al -ol a-a a-b a-t aaa aab aaf aag aal aao aar aas aat ab- aba abb abf abg abl abo abr abs abt af- afa afb aff afg afl afo afr afs aft ag- aga agb agf agg agl ago agr ags agt al- ala alb alf alg all alo alr als alt aoa aob aof aog aol aoo aor aos aot ar- ara arb arf arg arl aro arr ars art as- asa asb asf asg asl aso asr ass ast at- ata atb atf atg atl ato atr ats att baa bab baf bag bal bao bar bas bat bba bbb bbf bbg bbl bbo bbr bbs bbt bfa bfb bff bfg bfl bfo bfr bfs bft bga bgb bgf bgg bgl bgo bgr bgs bgt bla blb blf blg bll blo blr bls blt boa bob bof bog bol boo bor bos bot bra brb brf brg brl bro brr brs brt bsa bsb bsf bsg bsl bso bsr bss bst bta btb btf btg btl bto btr bts btt faa fab faf fag fal fao far fas fat fba fbb fbf fbg fbl fbo fbr fbs fbt ffa fff ffg ffl ffo ffr ffs fft fga fgb fgf fgg fgl fgr fgs fgt fla flb flf flg fll flo flr fls flt foa fob fof fog fol foo for fos fot fra frb frf frg frl fro frr frs frt fsa fsb fsf fsg fsl fso fsr fss fst fta ftb ftf ftg ftl fto ftr fts ftt gaa gab gaf gag gal gao gar gas gat gba gbf gbg gbl gbo gbr gbs gbt gfa gfb gff gfl gfo gfr gfs gft gga ggb ggg ggo ggr ggs ggt gla glb glf glg gll glo glr gls glt goa gob gof gog gol goo gor gos got gra grb grf grg grl gro grr grs grt gsa gsb gsf gsg gsl gso gsr gss gst gta gtb gtf gtg gtl gto gtr gts gtt la- laa lab laf lag lal lao lar las lat lba lbb lbf lbg lbl lbo lbr lbs lbt lfa lfb lff lfg lfl lfo lfr lfs lft lga lgb lgf lgg lgl lgo lgr lgs lgt lla llb llf llg lll llo llr lls llt loa lob lof log lol loo lor los lot lra lrb lrf lrg lro lrr lrs lrt lsa lsb lsf lsg lsl lso lsr lss lst lta ltb ltf ltg ltl lto ltr lts ltt oaa oab oaf oag oal oao oar oas oat ob- oba obb obf obg obl obo obr obs obt of- ofa ofb off ofg ofl ofo ofr ofs oft oga ogf ogg ogl ogo ogs ogt ola olb olf olg oll olo ols olt oo- ooa oob oof oog ool ooo oor oos oot or- ora orb orf org orl oro orr ors ort os- osa osb osf osg osl oso osr oss ost ot- ota otb otf otg otl oto otr ots ott ra- raa rab raf rag ral rao rar ras rat rba rbb rbf rbg rbl rbo rbr rbs rbt rfa rfb rff rfg rfl rfo rfr rfs rft rga rgb rgf rgg rgo rgr rgs rgt rla rlf rlg rll rlo rlr rls rlt roa rob rof rog rol roo ror ros rot rra rrb rrf rrg rrl rrr rrs rrt rsa rsb rsf rsg rsl rso rsr rss rst rta rtb rtf rtg rtl rto rtr rts rtt saa sab saf sag sal sao sar sas sat sba sbb sbf sbg sbl sbo sbr sbs sbt sfa sfb sff sfg sfl sfo sfr sfs sft sga sgb sgf sgg sgl sgo sgr sgs sgt sla slb slf slg sll slo slr sls slt soa sob sof sog sol soo sor sos sot sr- sra srb srf srg srl sro srr srs srt ss- ssa ssb ssf ssg ssl sso ssr sss sst sta stb stf stg stl sto str sts stt taa tab taf tag tal tao tar tas tat tba tbb tbf tbg tbl tbo tbr tbs tbt tfa tfb tff tfg tfl tfo tfr tfs tft tga tgb tgf tgg tgl tgo tgr tgs tgt tla tlf tlg tll tlo tlr tls tlt to- toa tob tof tog tol too tor tos tot tra trb trf trg trl tro trr trs trt tsa tsb tsf tsg tsl tso tsr tss tst tta ttb ttf ttg ttl tto ttr tts ttt